Tool holder



FIG. 1 is a perspective view of a tool holder showing my new design;

FIG. 2 is a left-side view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a right-side view thereof; and,

FIG. 7 is a rear view thereof.

The broken line showing of environment in the drawing of FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a tool holder, as shown. 